3分之2-4分之3×11分之4＋3分之1÷7分之3
=2/3-3/11+7/9
=13/9-3/11
=116/99
3.14×43＋7.2×31.4-150×0.314
=3.14×43＋72×3.14-15×3.14
=(43+72-15)×3.14
=(115-15)×3.14
=100×3.14
=314